Perfectly sound.

(sound, headphones) the property of blocking off outside sound through use of materials that reduce sound transmission from the exterior environment into the interior environment

(phonology) A rule that describes historical sound change (the change in pronunciation of a given sound or cluster of sounds) in the development of a language.

plural of sound law

plural of sounding balloon

plural of sound energy

plural of sound blimp

plural of sounding rod

plural of sound bite

(transitive) To question and listen attentively in order to discover a person's opinion, intent, or preference, especially by using indirect conversational remarks.